B2810

Diagnostic Chart:

CIRCUIT DESCRIPTION
The steering wheel controls consist of multiple momentary contact switches that connect a series of resistors so that each switch selection corresponds to a fixed resistance value. These fixed resistance values allow the dash integration module (DIM) to identify which switch has been pressed. The DIM upon receiving and identifying the switch input, will send a class 2 message to the radio in order to carry out the request.

CONDITIONS FOR RUNNING THE DTC
The ignition must be turned on.

CONDITIONS FOR SETTING THE DTC
An entertainment switch must be stuck (pressed) for at least 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The DIM will ignore all switch commands.
^ DTC B2810 will set current as long as the fault is present.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The stuck switch condition must be corrected.
^ The DTC can be cleared with a scan tool.
^ The history DTC will clear after 50 fault free ignition cycles.

DIAGNOSTIC AIDS
If DTC B2810 is set only in history, check the operation of all steering wheel control switches several times in order to verify the customer concern.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that the steering wheel control switch is stuck. The control switches operate in the 123-247 count range. The value given is the normal condition that exists when no switch is activated.